Mobile Spec MSIF1500 FM Transmitter with Gooseneck Dock Stand for iPod/iPhone to Vehicle Stereo Transmits, charges and holds iPod/iPhone in your vehicle, wirelessly transmits music to your vehicle FM stereo Plays other external audio sources with included 35 millimeter cable 4 preset channels, tune manually or automatic, blue LCD frequency display Flexible gooseneck stand for easy adjustments, 12-volt power adapter charges your device while in use Frequency range: full channel 88.1-107.9 megahertz (100 kilohertz/step), frequency modulation: 15 hertz-20 hertz